Why did Germany surrender in WWI so quickly thereby giving the stab-in-the-back conspiracy used by the Nazi?

Answers

They did not surrender quickly. Contrary to popular belief, most German leaders were very nationalistic and only surrendered when no better option was available. Post WW1 right wing nutjobs like the Freikorps fabricated the whole story to their own advantage and called the leaders "cowards" and "traitors"

the Germans were talking peace in 1916 and by 1918 there were food Riots in Berlin the German navy had Mutinied the Front line was short of ammunition Food Uniforms and medical supplies and once the British developed the Tank Germany could not win

A.) Low manpower
B.) Low resources. (They were scrapping chruch/tower bells that were hundreds of years old to make ammuntion)
C.) Large food shortages.
D.) Civilian population demanding war be ended, large strikes.
E.) America entered the war (Which had full might of resources, manpower, ect..)
F.) The 1918 allied Summer offensive broke through much of the German lines.

Germany had the upper hand by 1917, having Britain's back against the wall with nowhere to turn. Britain was considering Germany's generous offer to call off the war and each country going their separate ways when the Zionists came to Britain and offered to bring the United States into the war in exchange for the rights to Palestine once Britain won.

Bringing America into the war resulted in a stalemate with neither side gaining ground. This is when the Armacist was declared, with both sides taking time to consider their options. During the pause in fighting, Britain increased its illegal embargo against Germany. It was illegal because embargoes aren't supposed to deny another country its basic living needs (such as food), only items of military value.

But Britain tightened the embargo against Germany importing food they needed, and thus starved Germany into surrender.

The Kiel mutiny was a major revolt by sailors of the German High Seas Fleet on 3 November 1918. The revolt triggered the German revolution which was to sweep aside the monarchy within a few days. It ultimately led to the end of the German Empire and to the establishment of the Weimar Republic.

Germany surrendered because Germany only entered World War I in defense of Austria-Hungary after Serbia had assassinated Austria-Hungary's leader, Archduke Franz Ferdinand, and his wife, Princess Sophie, while they were on a peace-making mission in Sarajevo and after the Allies then rallied behind Serbia and came to Serbia's defense when Austria-Hungary declared war on Serbia for Serbia's act of war. Since Germany was only in the war to defend Austria-Hungary, when Austria-Hungary later fell, Germany's reason for being in the war ended, so Germany wanted out of a war that kept dragging on despite its raison d'être having long since ended. Germany didn't see the point of continuing to fight for no other reason than to avenge a fallen friend when so many of its sons lives were being lost, so that's why Germany surrendered.